Posts (page 19)
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2 min readTo select the average from row results in Oracle, you can use the AVG() function in a SQL query. This function calculates the average value of a numeric column or expression.
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4 min readTo store a JSON array in Oracle, you can use the JSON data type introduced in Oracle Database 12c. You can define a column with the JSON data type and store the JSON array as a string in that column. Oracle also provides functions and operators for working with JSON data, such as JSON_OBJECT, JSON_ARRAY, JSON_VALUE, and JSON_QUERY. Additionally, you can use the PL/SQL JSON API to work with JSON data in Oracle.
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5 min readIn Oracle, you can get unique values by using the DISTINCT keyword in your SQL query. This keyword eliminates duplicate records from the result set, ensuring that only unique values are returned. For example, you can use the following query to get unique values from a table:SELECT DISTINCT column_name FROM table_name;This query will return only the distinct values from the specified column in the table.
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7 min readTo insert a video into an Oracle database, you can use the BLOB (Binary Large Object) data type to store the video file.First, you need to create a table in your Oracle database with a column of type BLOB to store the video data. You can then use SQL commands or a programming language like Java or Python to insert the video file into the BLOB column of the table.When inserting the video file into the database, you will need to use an INSERT statement that includes the video file data.
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7 min readTo convert Oracle TO_NUMBER function to SQL Server, you can use the CAST or CONVERT functions in SQL Server.In Oracle, the TO_NUMBER function is used to convert a character string to a number. In SQL Server, you can achieve the same result using the CAST or CONVERT functions.
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4 min readTo call an oracle stored procedure in Node.js, you can use the node-oracledb module. First, you need to install the module using npm. Then, you can establish a connection to your Oracle database using the oracledb module. Once the connection is established, you can create a stored procedure call using the execute method provided by the module. The execute method takes the SQL query as a parameter, along with any input and output bind variables required by the stored procedure.
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4 min readTo call a stored procedure in Oracle PL/SQL, you need to use the EXECUTE or CALL statement followed by the name of the procedure and any required parameters enclosed in parentheses.
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7 min readTo return multiple records from a single record in Oracle, you can use the UNPIVOT function. UNPIVOT allows you to rotate columns into rows, effectively splitting a single record into multiple records. This can be particularly useful when you have data stored in a denormalized format and need to query it in a more normalized way. By using UNPIVOT, you can transform columns into rows, making it easier to work with the data in a tabular format.
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4 min readTo fill an empty column from another table in Oracle, you can use the UPDATE statement with a subquery. First, you need to identify the columns in both tables that you want to match on. Then, you can write a subquery to select the data from the other table that you want to insert into the empty column. Finally, you can use the UPDATE statement to set the values in the empty column based on the results of the subquery.
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7 min readTo update a nested array in JSON using Oracle, you can use the JSON_MODIFY function. This function allows you to modify specific elements within a JSON document, including nested arrays.You can specify the path to the nested array element you want to update, along with the new value you want to assign to that element. The JSON_MODIFY function will then update the nested array in the JSON document accordingly.
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5 min readTo display two counts using Oracle databases, you can use the COUNT function along with the GROUP BY clause. You can write a SQL query that includes two COUNT functions, each counting different columns or conditions, and then use GROUP BY to separate the counts accordingly. This allows you to display both counts in the result set, providing valuable information about the data in your database.
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4 min readTo separate a range of years in Oracle, you can utilize the EXTRACT function to extract the year from a date column. For example, you can use the EXTRACT function along with the BETWEEN operator to filter records based on a specific range of years. This allows you to retrieve data that falls within a certain range of years, such as from 2010 to 2015. Additionally, you can use the TO_CHAR function to convert the date column to a specific format before extracting the year.